Technical methodology
How Membrain builds waterproofing guidance
Membrain is designed to help a building owner move from a visible symptom to a supported next decision without pretending that a photograph can prove what it cannot see.
Published 7 October 2026.
The principles
Observe before naming a cause
A damp patch is where water became visible, not necessarily where it entered. Membrain records the pattern, location, timing and nearby construction before forming a likely source.
Keep observations separate from interpretation
Visible staining, cracks or damaged grout are observations. A terrace leak, pipe leak or failed wet-area waterproofing is an interpretation until the evidence supports it.
Ask only for evidence that changes the decision
A useful follow-up photo or question should separate two plausible causes. Repeating requests for more photos is not a substitute for a site inspection.
Treat remote guidance as remote guidance
Photos cannot reveal concealed services, the condition of a membrane under tiles or moisture depth. When those facts matter, Membrain says that a site check is needed.
Keep repair methods tied to approved documents
The customer-facing app assembles repair plans only from current approved manufacturer documents in Membrain's technical library. Public guides stay brand-neutral and explain the decision path rather than selling a product.
Preserve uncertainty and the record
A likely cause is not labelled as a verified repair. Membrain keeps the evidence, decision and later execution checks distinct so the building retains a usable history.
What the public guides do not claim
- They do not turn a single photograph into a confirmed diagnosis.
- They do not guarantee that one repair will resolve every contributing source.
- They do not replace the current technical data sheet for a product used on site.
- They do not mark a repair as verified merely because a plan was generated.
See the method in practice
The problem guides show the visible signs, plausible sources, checks that separate them, common mistakes and when an on-site inspection is needed.